JPH11107575A - Vibration control structure for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the vibration of the whole building by movably supporting, at least, a floor of one story on support members provided on a main body structural part of a building via a base isolation device and by absorbing the vibration energy by the damper device. SOLUTION: A plurality of oil damper devices 15 are installed in the circumference of a base isolation floor 14 supported by a base isolation device 13. The oil damper devices 15 are installed between a pair of opposed circumferential end parts of the horizontal X-directional and Y directional base isolation floor 14, and an external skeleton 11. It is sufficient that at least, one base isolation floor 14 is provided, however, all the floors in all the stories of the building 10 may be set to the base isolation floors. The rigidity of the base isolation device 13 is set to a sure value so as to coincide the vibration period of the base isolation floor to the natural vibration period of the main structure 11 or set to weak so as to vibrate at a longer vibration period. The base isolation device 13 is so constituted that a plurality of thin metal plates and metal thin rubber plates are alternately laminated with each other. This constitution can suppress the vibration of the floor part and at the same time suppress the vibration of the whole building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure for a building, and more particularly, to a vibration control structure for a building in which the floor of a plurality of floors is movably supported by a seismic isolation device. About earthquake structure.

[0002]

2. Description of the Related Art Conventionally, as a vibration control means for a building, those disclosed in JP-A-1-165885, JP-A-1-247667, JP-A-1-250568 and the like are known. I have. The vibration damping structure disclosed in Japanese Patent Application Laid-Open No. 1-165885 has a structure in which at least a part of a wall corresponding to a maximum amplitude of a plurality of natural vibration modes of the structure is movable in a horizontal direction, Moreover, the natural vibration period of these walls themselves is made to substantially match the natural period of each vibration mode of the structure, and the wall is provided with a damping mechanism for damping its own horizontal vibration. Is what you do.

The multi-story seismic isolation structure disclosed in Japanese Patent Application Laid-Open No. 1-247667 is a small-scale seismic isolation structure having a single-layer or multiple-layer floor in the internal space of each layer in a main frame including columns and beams. The frame group is suspended from a beam of the main frame via a suspension member while maintaining a clearance with the main frame.

Further, in a vibration control structure of a building structure disclosed in Japanese Patent Application Laid-Open No. 1-25688, a part of a wall or a floor of the structure is provided so as to be displaceable in a horizontal direction with respect to the structure. Between the movable wall or movable floor and the structure, a drive mechanism that allows relative displacement within the set range of both is interposed, and based on the behavior detection by the vibration sensor provided to detect the behavior of the structure, A control device for operating a driving mechanism to move the movable wall or the movable floor toward and away from the structure is provided.

[0005]

However, in the invention disclosed in Japanese Patent Application Laid-Open No. 1-165885, the natural vibration period of the wall itself corresponding to the maximum amplitude of the multiple natural vibration modes of the structure is determined. Since the natural vibration of each vibration mode of the structure is matched and the horizontal vibration of the wall itself is attenuated by the damping mechanism, the design and construction of the structure is extremely difficult, and it costs much. There was a problem.

Further, in this conventional vibration control structure, there is no concept of "seismic isolation of the floor", and the floor and the frame of the building vibrate in the same manner. There was a problem that many vibration control devices had to be installed in order to control structures to a safe level for people and things.

In the multi-story seismic isolation structure disclosed in Japanese Patent Application Laid-Open No. 1-247667, a small frame group consisting of a single-layer or multiple-layer floors is provided in the internal space of each layer in the main frame. However, since the beam of the main frame is suspended and supported via the suspension material while maintaining the clearance with the main frame, the structure becomes very complicated and the building having such a structure is unrealistic. was there.

Further, in the vibration damping structure of a building structure disclosed in Japanese Patent Application Laid-Open No. Hei 1-250568, a behavior of the structure is detected by using a wall or a floor provided to be displaceable in a horizontal direction with respect to the structure. Based on the behavior detection by the vibration sensor, the drive mechanism actively moves to reduce the relative displacement with the structure, so the scale including the pressurizing pump, control device and other peripheral devices is very large. There is a problem that a driving mechanism is required.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. The floor is supported by a seismic isolation device so as to be movable in the horizontal direction, and the floor is shaken in the horizontal direction. To provide a building vibration control structure which controls the vibration of the whole building by controlling the vibration.

[0010]

SUMMARY OF THE INVENTION The present invention is a vibration control structure for a building, and is configured as follows to solve the above-mentioned technical problem. In other words, the seismic isolation structure of a building according to the present invention includes a seismic isolation device in which at least a part or the entire floor of at least one arbitrary floor of the building is placed on a support member provided in a main body structure of the building. The seismic isolation device is constructed as a seismic isolation floor that is movably supported in the horizontal direction through a damper. This seismic isolation device has a built-in damper function that absorbs and attenuates the horizontal vibration energy applied to the seismic isolation floor. The rigidity of the device is set firmly so as to vibrate at substantially the same period as the natural vibration period of the main body structure of the building, and resonates with the natural vibration of the main body structure, and the vibration energy applied to the seismic isolation floor is The seismic isolation device is characterized in that it is intensively absorbed by the damper function of the seismic isolation device to suppress the shaking of the entire building.

According to another aspect of the present invention, there is provided a vibration damping structure for a building in which a part or the whole of at least one floor of a building is supported on a support member provided on a main body structure of the building. The seismic isolation device is constructed as a seismic isolation floor that is supported movably in the horizontal direction via a seismic isolation device.The seismic isolation device has a built-in damper function that absorbs and attenuates horizontal vibration energy applied to the seismic isolation floor. The rigidity of the seismic isolation device is set weaker so that it vibrates at a longer period than the natural vibration period of the main body structure of the building, and the vibration energy applied to the seismic isolation floor is absorbed and damped by the damper function of the seismic isolation device And, the shaking of the whole building is suppressed.

Still another aspect of the present invention provides a vibration control structure for a building, in which at least a part or all of a floor of at least one arbitrary floor of the building is supported by a support member provided on a main body structure of the building. The seismic isolation floor is supported movably in the horizontal direction via a seismic isolation device, and the seismic isolation floor and the main body structure of the building are used to absorb and attenuate the horizontal vibration energy applied to the seismic isolation floor. The damper device is installed between the two, and the rigidity of the seismic isolation device is set firmly so that it vibrates at substantially the same cycle as the natural vibration cycle of the main body structure of the building, and the natural vibration of the main body structural part It is characterized in that it resonates and the vibration energy applied to the seismic isolation floor is intensively absorbed by the damper device to suppress the shaking of the whole building.

[0013] Further, a vibration damping structure for a building according to another invention is a method for damping a part or all of a floor of at least one arbitrary floor of a building on a support member provided on a main body structure of the building. The seismic isolation floor is supported movably in the horizontal direction via a seismic isolation device, and the seismic isolation floor and the main body structure of the building are used to absorb and attenuate horizontal vibration energy applied to the seismic isolation floor. The damper device is installed between the two, and the rigidity of the seismic isolation device is set weaker so as to vibrate at a longer period than the natural vibration period of the main body structure of the building, and the vibration applied to the seismic isolation floor Energy is absorbed and attenuated by a damper device to suppress the shaking of the entire building.

<Concrete Configuration of the Present Invention> The vibration control structure of a building according to the present invention is composed of the essential components described above, but is established even if the components are specifically as follows. I do. The concrete component is that a damper device is installed between a pair of opposing peripheral ends of the base-isolated floor and the outer frame to absorb vibration in the horizontal X direction of the floor, and furthermore, the horizontal X The seismic isolation floor comprises at least two damper devices installed between the other opposing pair of peripheral ends and the main structure to absorb vibration in the horizontal Y direction substantially orthogonal to the direction. It is characterized by the following. In addition, it is also preferable that a part or all of the floors of all floors of the above-mentioned building be seismically isolated floors.

According to the seismic isolation structure of a building of the present invention, when vibration energy is applied to the building due to, for example, an earthquake, the seismic isolation floor of the building is actuated by a seismic isolation device to operate the main body of the building. It moves horizontally relative to the structure. At this time, the vibration cycle of the base-isolated floor is equal to or longer than that of the main body structure depending on the rigidity of the base-isolation device.

If the vibration cycle of the base-isolated floor matches the natural vibration cycle of the main body structural part by setting the seismic isolation device firmly, the natural vibration of the main body structural part of the building and the vibration of the base-isolated floor will be reduced. Resonates, and the vibration energy applied to the entire building concentrates on the vibration of the base-isolated floor. Therefore, the horizontal movement of the seismic isolation floor relative to the main structure is attenuated (absorbed) by the damper function built into the seismic isolation device or by a separately installed damper device. Is suppressed.

When the vibration period of the base-isolated floor is made longer than the natural vibration period of the main body structure by setting the seismic isolation device to be weaker, the external vibration force to the floor becomes difficult to be transmitted, and extremely. Speaking of this, the floor is the same as when it is not moving. Since the floor occupies a considerable weight when viewed from the whole building,
If the floor becomes less susceptible to vibration, the seismic force acting on the entire building will be reduced. At that time, the vibration energy of the seismic isolation floor is absorbed (attenuated) by the damper function built in the seismic isolation device or by the damper device.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a vibration control structure of a building according to the present invention.
FIG. 1 shows a building 10 having a vibration control structure according to one embodiment of the present invention. The seismic damping structure of a building according to this embodiment includes a normal seismic isolation device 13 on a main body structure 11 of a building 10, that is, a support member including a beam 12 provided on an outer skeleton including columns and outer walls. The floor includes a seismic isolation floor 14 supported movably in the horizontal direction through the floor.

As shown in FIG. 2, the seismic isolation device 13 is formed by alternately stacking a large number of thin metal plates 13a and thin rubber plates 13b, and the structure is already well known. The seismic isolation floor 14 is a beam 1 provided on the main body structure 11 using the seismic isolation device 13 in the building 10.
2 means a floor supported so as to be movable in the horizontal direction. In FIG. 1, the beam 1 is provided without the seismic isolation device 13 or the like.
The floor formed conventionally on 2 is designated by the reference numeral 16.

Then, around the seismic isolation floor 14 supported by the seismic isolation device 13, as shown in FIG. 3, the horizontal movement of the seismic isolation floor 14 is stopped at the time of vibration and the vibration is attenuated (absorbed). A plurality of oil damper devices 15 are provided for the purpose. The basic structure of the oil damper device 15 is as follows. When a piston at the rod end located inside the cylinder moves in the cylinder with the movement of the rod, the oil is separated from one chamber in the cylinder divided by the piston. Is allowed to flow through the orifice provided in the piston into the other chamber, whereby the movement of the piston is suppressed, and the rod is returned to the original position by a spring.

Such an oil damper device 15 is already well-known, and therefore a detailed description thereof will be omitted. The oil damper device 15 is provided between the pair of opposing peripheral ends of the seismic isolation floor 14 and the main body structure, that is, the outer frame 11, and substantially in the horizontal X direction to absorb the vibration of the seismic isolation floor 14 in the horizontal X direction. In order to absorb vibration in the orthogonal horizontal Y direction, it is necessary to install the seismic isolation floor 14 at least between another pair of opposite peripheral ends and the outer frame 11.

The number of such oil damper devices 15
That is, how many are installed depends on the performance of the damper device 15 and the position (the number of floors) of the seismic isolation floor 14 in the building. Therefore, it is preferable to appropriately design in advance with these elements in mind.

By the way, in the seismic control structure of the building according to this embodiment, the seismic isolation
The rigidity of the seismic isolation device 13 that supports the movable body in the horizontal direction is set so as to vibrate at substantially the same cycle as the natural vibration cycle of the main body structure 11 of the building. The rigidity of the seismic isolation device 13 can be set based on the diameter (cross-sectional area) of the laminated rubber and the number of rubber sheets used.

Accordingly, when an external force such as an earthquake is applied to the building 10, the seismic isolation floor 14 resonates with the natural vibration of the main body structure 11 and vibrates extremely. That is, the seismic force applied to the main body structure 11 is concentrated on the vibration energy that moves the base-isolated floor 14 in the horizontal direction. Therefore, if the vibration of the seismic isolation floor 14 is attenuated (absorbed) by the above-described oil damper device 15, the vibration of the main body structure 11 of the building 10 is also suppressed, and the vibration of the entire building is suppressed without increasing. be able to.

In the vibration damping structure for a building according to this embodiment, the seismic force on the main body structure 11 can be reduced even if the rigidity of the seismic isolation device 13 is set to be low. That is, if the rigidity of the seismic isolation device 13 is set to be weaker so as to vibrate at a period longer than the natural vibration period of the main body structure 11 of the building 10, the external vibration force is less likely to be transmitted to the seismic isolation floor 14, It will vibrate in a very long cycle, which is extremely equivalent to a state of no movement.

Since the floor occupies a considerable weight when viewed from the whole building, the seismic force acting on the whole building is reduced when the base-isolated floor 14 is hardly subject to vibration. As a result, the swing of the main body structure 11 in the building 10 does not increase,
It is possible to control the vibration.

When the seismic isolation floor 14 is supported by the seismic isolation device 13 so as to be movable in the horizontal direction, the seismic isolation device 13 is used.
The rigidity of the building 10 is set so as to match the natural vibration cycle of the main body structure 11 in the building 10, or the stiffness of the building 10 is set to move at a vibration cycle longer than the natural vibration cycle of the main body structure 11. Since the shaking of the main body structure 11 at the time can be effectively suppressed, a great effect is obtained economically.

If at least one such seismic isolation floor 14 is provided, a certain effect can be obtained. However, if the floors of all floors in the building 10 are made seismic isolation floors, each floor at the time of an earthquake can be used. Not only is a person or an object located above not violently rocked, but also the rocking of the main body structure can be further suppressed. However, in reality, not all floors on a certain floor can be seismically isolated floors. For example, landings on stairs are preferably excluded from the target of the “seismically isolated floor” here.

In such a sense, "all of the floor" does not include a floor which cannot be separated from the main body structure, but means a substantial floor. And, "part of the floor" means that, in such a substantial floor part, a part of the floor can be used as a base-isolated floor.

In the vibration control structure according to one embodiment of the present invention, the seismic isolation device 13 is configured by alternately laminating thin metal plates 13a and rubber plates 13b. As shown, a spherical receiving plate 23 a is provided on the lower surface of the seismic isolation floor 14, and
A seismic isolation device, that is, a rolling bearing 23, configured to attach a sphere 23b installed at the center of 3a may be used.

According to such a rolling bearing 23, when the base-isolated floor 14 moves in the horizontal direction, the base-isolated floor 14 is automatically returned to the original position by using the spherical surface of the receiving plate 23a. Restorability can be provided. This rolling bearing 2
The setting of the rigidity in 3 is to increase or decrease the resilience, which can be performed by changing the spherical curvature of the receiving plate 23a. In other words, shortening the curvature of the spherical surface shortens the period and obtains the same seismic isolation effect as increasing rigidity, and increasing the curvature increases the period and obtaining the same seismic isolation effect as reducing the rigidity. Can be.

In the above-described embodiment, the oil damper device 15 is described as being installed between the end face of the floor portion 14 and the inner wall face of the outer frame 11 as shown in FIG. It is needless to say that the apparatus is not limited to such an installation position, but can be installed on the lower surface side of the seismic isolation floor 14 as shown in FIG.

Further, in the above embodiment, the vibration energy in the horizontal direction applied to the seismic isolation floor is transferred to the oil damper device 1.
Although the damper 5 is used to absorb and attenuate, the same effect can be obtained by using a special seismic isolation device having a built-in damper function without using such an oil damper device 15.

The seismic isolation device having a built-in damper function is an improved type of "rolling bearing" developed in recent years, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-54040.
In addition, a seismic isolation device shown in FIG. 2 using a high damping laminated rubber instead of a normal laminated rubber is also known.

Although this high damping laminated rubber is already known, the characteristics of the laminated rubber will be briefly described. This laminated rubber simultaneously has a “load supporting function”, a “spring function”, and a “damping (damping) function”. This hysteresis loop has a viscous damping, so it draws a smooth curve, and its damping capacity is around 15% (equivalent damping constant) over a wide range of amplitude. .

Further, as a seismic isolation device having a built-in damper function, a slide bearing can be used. That is, when the sliding bearing is used as the seismic isolation device, the frictional force associated with the sliding can be used as a damper function. Although this slide bearing is already known, to briefly explain, this slide bearing has both a “load supporting function” and a “damping (damping) function” at the same time. The coefficient of friction is reduced to about 0.1 by the combination of resin and stainless steel plate, and when an earthquake acceleration exceeding the frictional force is applied, sliding occurs while supporting the vertical load, and the frictional resistance is opposite to the sliding direction. As a result, a damping effect similar to that of the damper can be obtained.

As described above, a seismic isolation device having a high damping laminated rubber, an improved type of rolling bearing, or a seismic isolation device having a built-in damper function, including a sliding bearing, has a structure in which the bearing function and the damper function work integrally. It is not necessary to separately provide the oil damper device as described above, and the configuration can be simplified while obtaining a desired effect. In addition, when using a sliding bearing, it can be used alone, but usually, it is used together with a spring such as a laminated rubber or a coil spring, or a curvature is applied to the sliding surface so as to have a restoring force to return to an original position. It is necessary to

[0038]

As described above, according to the building vibration control structure of the present invention, when the floor is supported by the conventionally known seismic isolation device, the rigidity of the seismic isolation device is reduced by the structure of the main body structure. The vibration control of the main body structure of the building can be achieved at the same time simply by setting it to match the natural vibration period or by setting it to move at a vibration period longer than the natural vibration period of the main body structure. Therefore, according to the present invention, it is possible to control the vibration of the building without complicated design and construction, and without incurring a large cost.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view schematically showing a building provided with a vibration control structure according to an embodiment of the present invention.

FIG. 2 is a schematic structural explanatory view showing an enlarged view of a seismic isolation device attached to the building shown in FIG. 1;

FIG. 3 is a perspective view schematically showing a seismic isolation floor attached to the building shown in FIG. 1.

FIG. 4 is a configuration explanatory view schematically showing another example of the seismic isolation device supporting the floor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Building 11 Main body structural part 12 Beam (support member) 13 Seismic isolation device 14 Seismic isolation floor 15 Oil damper device 16 Floor

Claims (6)

[Claims] 1. A part or all of a floor of at least one arbitrary floor of a building is horizontally movable via a seismic isolation device on a support member provided on a main body structure of the building. The seismic isolation device is configured as a supported seismic isolation floor, and has a built-in damper function that absorbs and attenuates horizontal vibration energy applied to the seismic isolation floor,
Further, the rigidity of the seismic isolation device is set so as to vibrate at substantially the same cycle as the natural vibration cycle of the main body structure of the building, and is resonated with the natural vibration of the main body structure, to the seismic isolation floor. A vibration control structure for a building, wherein added vibration energy is intensively absorbed by a damper function of the seismic isolation device so as to suppress shaking of the whole building. 2. A part or all of a floor of at least one arbitrary floor of a building is horizontally movable via a seismic isolation device on a support member provided on a main body structure of the building. The seismic isolation device is configured as a supported seismic isolation floor, and has a built-in damper function that absorbs and attenuates horizontal vibration energy applied to the seismic isolation floor,
Further, the rigidity of the seismic isolation device is set to be weaker so as to vibrate at a longer period than the natural vibration period of the main body structure of the building, and the seismic isolation device has vibration energy applied to the seismic isolation floor. A vibration control structure for a building, wherein the vibration of the whole building is suppressed by absorbing and damping by a damper function. 3. A part or all of a floor of at least one arbitrary floor of a building is horizontally movable via a seismic isolation device on a support member provided on a main body structure of the building. A supported seismic isolation floor, and a damper device is installed between the seismic isolation floor and the main structure of the building to absorb and attenuate horizontal vibration energy applied to the seismic isolation floor. The rigidity of the seismic isolation device is set firmly so as to vibrate at substantially the same cycle as the natural vibration cycle of the main body structure of the building to resonate with the natural vibration of the main body structure, A vibration control structure for a building, wherein the vibration energy applied to the building is intensively absorbed by the damper device to suppress the shaking of the whole building. 4. A part or all of a floor of at least one arbitrary floor of a building is horizontally movable via a seismic isolation device on a support member provided on a main body structure of the building. A supported seismic isolation floor, and a damper device is installed between the seismic isolation floor and the main structure of the building to absorb and attenuate horizontal vibration energy applied to the seismic isolation floor. The rigidity of the seismic isolation device is set to be weaker so as to vibrate at a longer period than the natural vibration period of the main body structure of the building, and the vibration energy applied to the seismic isolation floor is absorbed by the damper device. A vibration damping structure for a building, wherein the vibration is damped to suppress the shaking of the whole building. 5. The apparatus according to claim 5, wherein said damper device is provided with a horizontal X
Installed between a pair of opposing peripheral ends of the seismic isolation floor and the outer frame to absorb vibration in the horizontal direction, and further, to absorb vibration in the horizontal Y direction substantially orthogonal to the horizontal X direction. 5. The building according to claim 3, wherein the building comprises at least two damper devices installed between another pair of opposite peripheral ends of the floor and the main body structure. Damping structure. 6. The seismic isolation structure of a building according to claim 3, wherein a part or all of the floors of all floors of the building are seismically isolated floors.